Automatic Scan Subject Positioning Offset Compensation
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Solution Overview
Problem
Current medical imaging systems face challenges in accurately centering scan subjects at the isocenter due to the limited accuracy of 3D depth cameras, leading to suboptimal image quality and increased radiation exposure, particularly for obese and pediatric patients.
Innovation Solution
A method and system for automatic scan subject positioning that involves acquiring scan information, determining scanning features, identifying offset characteristic values from a mapping table, and adjusting the target position to improve centering accuracy, utilizing a 3D depth camera and a positioning optimization module to compensate for deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automatic positioning is used based on 3D depth camera body contour, then positioning efficiency is improved, but centering accuracy deteriorates
Solution Approach 1:
The patent introduces a positioning optimization module as an intermediary between the 3D depth camera and the positioning system. This module acquires scan information, determines scanning features, identifies offset characteristic values from a mapping table, and adjusts target positions to compensate for the limited accuracy of the 3D depth camera, thereby improving centering accuracy while maintaining automatic positioning efficiency
Solution Approach 2:
The patent changes positioning parameters by introducing offset characteristic values that are identified from a mapping table based on scanning features. These offset values are used to adjust the target position of the scan subject, effectively compensating for inaccuracies in the 3D depth camera measurements and improving centering precision
2Ease of operation
If 3D depth camera is used for automatic positioning, then operation complexity is reduced, but positioning accuracy deteriorates
Solution Approach 1:
The positioning optimization module serves as an intermediary that processes the output from the 3D depth camera and refines the positioning accuracy. It maintains the ease of automatic operation while improving positioning precision through offset compensation based on scanning features and mapping tables
3Measurement precision
If manual positioning adjustment is performed to improve centering accuracy, then centering accuracy is improved, but workflow efficiency deteriorates
Solution Approach 1:
The system performs self-service positioning by automatically acquiring scan information, determining scanning features, identifying offset characteristic values, and adjusting target positions without requiring manual intervention. This maintains workflow efficiency while achieving improved centering accuracy through the positioning optimization module
Solution Approach 2:
The system uses feedback from scan information and scanning features to automatically adjust positioning. The positioning optimization module continuously refines the target position based on identified offset characteristic values, eliminating the need for manual adjustment while maintaining high centering accuracy
Data Source
AI summary
Disclosed are a method and system for automatic scan subject positioning in medical imaging. The method includes the following steps: acquiring scan information of a scan subject to be imaged and determining a scan subject scanning feature; identifying, on the basis of the scan subject scanning feature, a corresponding offset characteristic value from a mapping table between scanning features and offset characteristic values; and adjusting, on the basis of the corresponding offset characteristic value, a target position of the scan subject during automatic scan subject positioning.